Experimental Physics and
Industrial Control System

Marty Kraimer <[email protected]> · Tue, 16 May 2000 15:25:53 -0500

Geoff Savage wrote:
> 
> Hi,
> 
> I'm trying to understand the internals of alarm acknowledgement.  Here's
> my interpretation of putAcks().
> 
> static long putAcks(paddr,pbuffer,nRequest,no_elements,offset)
> DBADDR  *paddr;
> unsigned short  *pbuffer;
> long            nRequest;
> long            no_elements;
> long            offset;
> {
>     dbCommon *precord=(dbCommon *)(paddr->precord);
> 
>     if(*pbuffer >= precord->acks) {
>         precord->acks = 0;
>         db_post_events(precord,NULL,DBE_ALARM);
>         db_post_events(precord,&precord->acks,DBE_VALUE|DBE_ALARM);
>     }
>     return(0);
> }
> 
> 1. Only do anything when the acknowledge severity is higher than or
> equal to the currently unacknowledged severity.
> 
> Assuming this condition is met then
> 
> 2.  Reset the unacknowledge severity.
> 3. ???Send an alarm monitor to all clients monitoring at least one field
> in this record.???
> 4. Send a monitor to all clients monitoring the ACKS field value or
> alarm in this record.
> 
> I'm uncertain as to the purpose of step 3.  Would someone please
> explain.

Your interpretation is correct, i.e. 

3. Send an alarm monitor to all clients monitoring at least one field in this
record.

Marty Kraimer

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System